Disposable refill cartridge-tube for reloading grease dispensing guns



NOV. 1961 J. J. GALBIERZ 3,007,621

DISPOSABLE REFILL CARTRIDGE-TUBE FOR RELOADING GREASE DISPENSING GUNSFiled July 3, 1958 2 Sheets-Sheet 1 INVENTOR. JEROME J. GALBIERZATTORNEY Nov. 7, 1961 J. J. GALBIERZ 3,007,521

DISPOSABLE REFILL CARTRIDGE-TUBE FOR RELOADING GREASE DISPENSING GUNS 2Sheets-Sheet 2 Filed July 3;, 1958 FIG-.6.

FIG.5.

INVENTOR. JEROME J. GALBIERZ ATTORNEY United States Patent 3,007,621DISPOSABLE REFILL CARTRIDGE-TUBE FOR RELOADING GREASE DISPENSING GUNSJerome J. Galbierz, Glendale, Mo., assignor to R. C. Can Company,Overland, Mo., a corporation of Missouri Filed July 3, 1958, Ser. No.746,354 3 Claims. (Cl. 229-5.6)

This invention relates to a disposable type of tube-like caitridgecontainer for grease or the like for reloading a mechanical or hand typeof grease dispensing gun and more specifically to a container cartridgewith a tube-like body and leak proof end closures. One of the closuresis permanently attached to the tube-like body and provided with meansfor ready access to the contents of the container which means includes aseal which allows no seepage until fracture. The other end closure canbe any type but is preferably a slip type cap.

Usually cartridges are stored for some time before use or purchase andheretofore under unfavorable conditions where there is dampness,moisture and heat, the lubricant in the cartridge would seep past thefriction plug type closure currently in use and the product becameunsalable because the appearance indicated possible contamina' tion tothe consumer. These cartridges were then returned for refund, andrepresented a substantial loss to the packager.

The closure and container must be leakproof under any condition and atthe same time readily opened.

According to this invention, the cartridge is constructed of a spirallywound tube formed of layers. of paper or paper and metal foil, some ofwhich layers are impervious to the seepage of oil. Usually the tube hasa waxed paper or aluminum foil liner, and usually metal foil labelsuitable to receive printed indicia.

Each end of the tube is closed by a cap, must be readily removable forreasons which will later appear. Heretofore, both have usually beenremovable. In this construction, only one is readily removable, whichmay be termed the top end closure. The other, termed one of which forconvenience the bottom end closure, on the other hand, is permanentlyfixed to the cartridge and con- .structed from a centrally aperturedmetal cap, faced with a flexible composite sheet of sealing materialsealed to the metal surrounding the aperture, and coextensive with theinside of the cap surface. This cap is crimped onto the end of thecartridge so as to be nonremovable. The crimping operation seals thecartridge end by pressing the sheet on the cap on to the containerliner. This avoids objectionable seepage. It also provides easy openingfor discharging of the contents, when desired, by fracture of theportion of the seal exposed by the aperture in the end cap.

The accompanying drawings are illustrative of one form of the inventionand, when taken with the detailed description herein, illustrate thebest mode now contemplated for carrying the invention into practice.

According to the drawings:

FIG. 1 is a side view of a grease construction,

FIG. 2 is a side view in perspective illustrating the complete refillcartridge,

FIG. 3 is a side view in perspective illustrating the refill cartridgewith the top cap removed,

FIG. 4 is an end view of the non-removable cap on the refill cartridge,

FIG. 5 is a very much enlarged vertical sectional view of the cap andliner of sheet material before assembly with one another and thecartridge,

FIG. 6 is a vertical section, very much enlarged, illustrating the capassembled to the cartridge, and,

gun of conventional ice FIG. 7 is a side view in perspective showing theseal broken.

In FIG. 1 is illustrated a grease gun of conventional construction. Thegun has a barrel 1 closed at one end by a cap 2 mounting the pump 3 andits actuating linkage 4 and handle 5. Cap 2 has a dispensing fitting 6to which may be attached any one of a number of adapters of differentlength and different shape, all for convenience in reaching the greasefittings of the machinery.

On the opposite end of the gun is a removable cap 7 which in turn mountsa plunger 8 and an actuating handle 9. On the end of the plunger 8 is apiston and a spring for forcing the piston inwardly of the gun, neitherof which is shown.

The refill cartridge shown in FIG. 2 has a body 10, usually formed of aplurality of layers of spirally wound paper and foil, etc., all for thepurpose of containing the lubricant. The outside of the refill cartridge10 is dimensioned to readily slide into the gun barrel 1 after the cap 7has been removed. The upper end of the body 10 of the cartridge issealed by a removable cap 11, the construction of which may be frommetal or a suitable plastic such as described in a prior application byVincent G. Biedenstein, Serial No. 620,887, filed November 7, 1956, forSlip Cover and Plunger for Cartridge Container.

The container 10 is usually stored with the cap 11 up so as to preventseepage at the joint between the cap and the body of the cartridge.

The lower end of the cartridge 10 is sealed by an end closure 12, all in'a manner hereinafter described.

FIG. 3 illustrates the cartridge without the closure 11, ready forloading in the gun shown in FIG. 1. The enclosure 12, as shown in FIG.4, is apertured at 13 to expose a frangible seal which may be suitablyscored for rupture by any sharp instrument.

Operation After the end cap 7 of the grease gun shown in FIG. 1 isremoved, the plunger 9 is pulled out as far as possible with respect tothe cap 7, and locked. End closure 11 is then removed or fractured asdescribed in the prior application of Biedenstein. Seal 14 is rupturedas shown in FIG. 7. Cartridge 10 is inserted in the gun barrel 1 in thedirection illustrated in the drawing, cap 7 replaced, and plunger 8released by turning the handle 9. The gun is then charged and ready foroperation in the usual manner.

Fixed end closure One of the features of this invention resides in theend closure illustrated in FIGS. 5 and 6 on an enlarged scale, and themanner of constructing and applying this end closure 12 to the cartridgebody 10.

With reference to FIG. 5, metal end closure 12 has a central aperture 13disposed in the end wall 16, which is substantially the same as theinternal diameter of the cartridge body 10. Surrounding the end wall isa cylindrical flange 17 which is dimensioned to snugly wedge within theinternal surface of the cartridge body 10. The outer periphery of thecap 12 extends radially outwardly from flange 17. The seal 14 is appliedto the inner surface of the cap 12 and is preferably composed of acomposite sheet with a layer of aluminum foil such as 20, and a layer ofMylar 21.

In assembling the end closure 12 to the body of the cartridge 10, thecomposite sheet 14 is first placed in position on the inner surface ofthe end wall 16. Alternatively the sheet 14 may be attached to end wall16 by either heat sealing or adhesive. In the actual assembly, the outerperiphery of the sheet 14 extends beyond the outer periphery of the cap12. This is because sufiicient free material must be provided to besubstantially coextensive with the metal end closure after assembly ofthe end closure with the cartridge body.

Cap 12 is then spun onto, or crimped onto, the end of the cartridge bodyso that the sheet 14 is substantially coextensive with the internalsurface of the rolled edge on the end closure 12 and the exposed surfaceof the liner 26 in the cartridge body 10. This exposed surface isproduced by compression of the inner plies of body 10 so that the lineris rolled around the end of the body 10 as in FIG. 6.

The cartridge body is, in this particular instance, formed of two ormore spirally Wound layers of paper such .as 24 and 25 etc., which arecovered with a grease proof liner.

The label 27 can be a moisture barrier or of grease proof label stock.

The crimping or spinning in FIG. 6 provides for an effective sealagainst any seepage. The Mylar sheet 21 is extremely tough, and resistsaccidental rupture of the aluminum foil 20, and the foil 20 provides theimpervious liner.

A construction has been described which will fulfill all of the objectsof the invention, but it is contemplated that some .modifications willoccur to those skilled in the art which come within the terms of theaccompanying claims.

I claim:

.1.In a disposable refill cartridge tube for reloading a dispensing gun,in combination a tubular body of spirally wound sheets of paper with aliner impervious to oils, and a fixed closure for the lower end of saidtubular body, said fixed closure comprising an end wall, a centrallylocated aperture in said end wall, a cylindrical flange at the peripheryof. said end wall adapted to have a slip fit within saidtube body andadjacent the outer edge of said closure, a frangible seal coextensivewith said end wall and attached thereto to close said aperture, a freeportion on said seal extending beyond the flange on said end wall, saidfixed end closure being secured at its outer edge to said tubular bodyby a rolled bead so as to press said seal into pressure tight sealingcontact with said liner and said flange internally of said tubular bodyand with the closure outer edge and-said liner externally of saidtubular body.

2. In a disposable refill cartridge tube for reloading a dispensing gun,in combination a tubular body of spirally wound sheets of paper with aliner impervious to oils, and a fixed closure for the lower end of saidtubular body, said fixed closure comprising an end wall, a centrallylocated aperture in said end wall, a cylindrical flange at the peripheryof said end wall adapted to have a slip fit within said tube body andadjacent the outer edge of said closure, a frangible seal coextensivewith said end wall and attached thereto to close said aperture, a freeportion on said seal extending beyond the flange on said end wall, saidseal having a layer of metal foil exposed to the contents of saidcartridge and a layer of tough plastic secured to said foil and saidclosure wall, said fixed end closure being secured at its outer edge tosaid tubular body by a rolled bead so as to press said seal intopressure tight sealing contact with said liner and said flangeinternally of said tubular body and with the closure outer edge and saidliner externally of said tubular body.

3. In a disposable refill cartridge tube for reloading a dispensing gun,in combination, a tubular body of spirally wound sheets of paperincluding a liner impervious to oils, and a fixed closure for the lowerend of the tubular body comprising an end wall for said closure, acentrally located aperture in said end wall, a cylindrical flange at theperiphery of said end wall adapted to have a slip fit within saidtubular body and adjacent the outer edge of said closure, a frangibleseal coextensive with said end wall and attached thereto to close saidaperture, a free portion on said seal extending beyond the flange onsaid end wall of said fixed closure, said fixed end closure beingsecured at its outer edge to said tubular body by a rolled bead at theperiphery of said fixed closure around the end portion of said tubularbody to clamp the end portion of said tubular body between the peripheryof said closure and said flange so as to press said seal into pressuretight sealing contact with said liner to form a continuous sealed jointalong said flange and around the end of said tubular body.

References Cited in the file of this patent UNITED STATES PATENTS1,967,191 John July 17, 1934 2,106,577 Sherbondy Jan. 25, 1938 2,111,582Crewe Mar. 22, 1938 2,179,227 Caten Nov. 7, 1939 2,200,200 Donnelly May7, 1940 2,303,322 Bigger Dec. 1, 1942 2,325,922 Sehell Aug. 3, 19432,652,148 Preifer Sept. 15, 1943 2,833,450 Sherbondy May 6, 19582,863,179 Gaugler Dec. 9, 1958 2,902,396 Reynolds Sept. 1, 19592,927,543 Sherbondy Mar. 8, 1960

